Monday, August 3, 2009

reassigning this in php 5

In php 5 you can't assign a variable to $this. It will produce a fatal error.

Question: What is wrong with the following code valid in PHP 4 but invalid in PHP 5?

reassign($b);

?>

Answer:

1. Reassigning $this in PHP 5 throws a fatal error
2. It is missing access restrictions (public,private,protected) required in PHP 5
3. Classes need to implement the OverLoad interface for this behavior in PHP 5
4. $b is now an object handle and the reassign() method needs to be declared pass-by-reference
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